KR-20260064292-A - Thermal management monitoring system and control structure thereof for output control of rapid charger for electric vehicles

KR20260064292AKR 20260064292 AKR20260064292 AKR 20260064292AKR-20260064292-A

Abstract

The present invention relates to a thermal management monitoring system for an electric vehicle charger, comprising four sensors that measure the temperature and humidity inside and outside the charger, respectively, an external temperature sensor and an external humidity sensor configured to measure the temperature and humidity outside the charger, and an internal temperature sensor and an internal humidity sensor configured to measure the temperature and humidity inside the charger, respectively; and a charger cooling device comprising a compressor, a condenser, an expansion valve, and an evaporator configured to form a cooling cycle using a refrigerant, wherein the speed of the compressor and the opening amount of the expansion valve are controlled by configuring an algorithm based on the characteristic curve of the refrigerant and based on the sensing values measured from the four sensors.

Inventors

권미혜
홍향종

Assignees

주식회사 에스씨에스

Dates

Publication Date: 20260507
Application Date: 20241031

Claims (4)

In a thermal management monitoring system for a charger that performs thermal management by monitoring a charger for charging an electric vehicle, Four sensors for measuring the internal and external temperature and humidity of the charger, respectively, comprising an external temperature sensor and an external humidity sensor configured to measure the external temperature and humidity of the charger, respectively, and an internal temperature sensor and an internal humidity sensor configured to measure the internal temperature and humidity of the charger, respectively; and A charger cooling device comprising a compressor, a condenser, an expansion valve, and an evaporator is configured to form a cooling cycle using a refrigerant, and A thermal management monitoring system characterized by controlling the speed of the compressor and the opening amount of the expansion valve based on the characteristic curve of the refrigerant and the sensing values measured from the four sensors above, by configuring the control algorithm.
In paragraph 1, A thermal management monitoring system characterized by the above algorithm being configured to initiate artificial neural network learning by applying the principles of a cooling device based on the above sensing value.
In paragraph 2, A thermal management monitoring system characterized by further including first to fourth temperature and pressure sensors, each provided upstream of a compressor, a condenser, an expansion valve, and an evaporator.
In paragraph 3, The speed of the above compressor is controlled by an artificial neural network, and A thermal management monitoring system characterized in that the opening amount of the expansion valve is controlled according to the pressure value of the corresponding temperature pressure sensor among the first to fourth temperature pressure sensors.

Description

Thermal management monitoring system and control structure thereof for output control of rapid charger for electric vehicles The present invention relates to a thermal management monitoring system and a control structure for controlling the output of an electric vehicle rapid charger, and more specifically, to a thermal management monitoring system and a control structure for controlling the output of an electric vehicle rapid charger that enables the reduction of charging time for electric vehicles and the extension of the charger's lifespan by resolving charger failures and output degradation through a sensing, judgment, and control structure that actively responds to changes in the charger's external environment. Generally, since fast chargers for electric vehicles are installed outdoors, prolonged exposure to sunlight during the summer can cause the interior to become hot and humid, leading to a sharp drop in charging output and an increase in the charging time of electric vehicles. In particular, during the summer rainy season or winter, if the interior of the fast charger becomes a high-humidity environment, there is a problem where the power module of the fast charger burns out or a fire occurs along with the burning of the power module. Accordingly, there is a need for technology that can shorten the charging time of electric vehicles and extend the lifespan of chargers by actively responding to the ever-changing external environment of the charger to resolve charger failures and output degradation. FIG. 1 is a drawing illustrating the external configuration of a thermal management monitoring system according to an embodiment of the present invention. FIG. 2 is a diagram illustrating the internal configuration of a thermal management monitoring system according to an embodiment of the present invention. Figure 3 is a diagram illustrating the operation cycle of a thermal management system according to the refrigerant characteristic curve. FIG. 4 is a block diagram showing the configuration of a thermal management system according to the present invention. FIG. 5 is a block diagram showing a control method of a thermal management monitoring system according to the present invention. A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. The following detailed description is merely illustrative and illustrates a preferred embodiment of the present invention. FIG. 1 is a drawing illustrating the external configuration of a thermal management monitoring system according to an embodiment of the present invention, and FIG. 2 is a drawing illustrating the internal configuration. Referring to FIGS. 1 and 2, a thermal management monitoring system according to an embodiment of the present invention may be configured to include four sensors, including two external temperature sensors and an external humidity sensor, and two internal temperature sensors and an internal humidity sensor, so as to measure the temperature and humidity inside and outside the charger, respectively. The charger cooling device illustrated in FIG. 2 may be structured to be provided inside the charger or installed outside the charger, and may be a refrigerant system that forms a cooling cycle using a refrigerant. According to this configuration, the thermal management monitoring system of the present invention may consist of three elements: sensing, judgment, and control. Here, sensing is performed through four sensors configured to measure the temperature and humidity inside and outside the electric vehicle fast charger as described above, and judgment is performed by configuring an algorithm to control the compressor speed (rpm) and the opening amount of the expansion valve based on the respective characteristic curves according to the refrigerant (e.g., R134a, R1234yf) so as to enable stable control of the thermal management system, and the control can be configured in a structure that drives the thermal management system by finding the optimal compressor speed and the opening amount of the expansion valve by applying the temperature and humidity values inside and outside the charger measured by the sensing of the four sensors to the algorithm. FIG. 3 is a diagram illustrating the operation cycle of a thermal management system according to a refrigerant characteristic curve, and FIG. 4 is a block diagram showing the configuration of a thermal management system according to the present invention. As described above, the thermal management monitoring system of the present invention may be configured to place temperature and humidity sensors inside and outside the electric vehicle charger, respectively. The thermal management system of the present invention is configured such that the main components, such as a compressor, condenser, expansion valve, and evaporator, form a closed loop, and a temperature and pressure sensor, a PT sensor, is placed at the front of each